/* :root {
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

.card {
  padding: 2em;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
} */
/*reset.css用来存储清除浏览器的样式 ,后面添加了一部分通用样式*/

a {
  background-color: transparent;
  text-decoration: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
a:hover {
  outline: none;
  text-decoration: none;
}
a,
a:hover,
a:active,
a:visited,
a:link,
a:focus {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-tap-highlight-color: transparent;
  outline: none;
  text-decoration: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-user-modify: read-only;
  cursor: pointer;
}

body,
html,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
code,
form,
fieldset,
legend,
input,
button,
textarea,
p,
blockquote,
th,
td {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
fieldset,
img {
  border: 0;
}
address,
caption,
cite,
code,
dfn,
em,
strong,
th,
var,
optgroup {
  font-style: inherit;
  font-weight: inherit;
}
del,
ins {
  text-decoration: none;
}
li {
  list-style: none;
}
caption,
th {
  text-align: left;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: 100%;
  font-weight: normal;
}
q:before,
q:after {
  content: "";
}
abbr,
acronym {
  border: 0;
  font-variant: normal;
}
sup {
  vertical-align: baseline;
}
sub {
  vertical-align: baseline;
}
/*because legend doesn't inherit in IE */
legend {
  color: #000;
}
input,
button,
textarea,
select,
optgroup,
option {
  font-family: inherit;
  font-size: inherit;
  font-style: inherit;
  font-weight: inherit;
}
button,
html input[type="button"],
input[type="reset"],
input[type="submit"] {
  -webkit-appearance: button;
  cursor: pointer;
}
/*@purpose To enable resizing for IE */
/*@branch For IE6-Win, IE7-Win */
input,
button,
textarea,
select {
  font-size: 100%;
  outline: none;
}
button {
  /*消除button的默认样式*/
  /*这种写法是对所有的button标签同时生效*/
  margin: 0px;
  padding: 0px;
  /*自定义边框*/
  border: 0px;
  /*消除默认点击蓝色边框效果*/
  outline: none;
  background: none;
}
/*select*/
select {
  /*复写Chrome和Firefox里面的边框*/
  border: 1px solid green;
  /*清除默认样式*/
  appearance: none;
  -moz-appearance: none;
  -webkit-appearance: none;
  /*在选择框的最右侧中间显示小箭头图片*/
  /*background: url(../img/icon/icon_select.png) no-repeat scroll right center transparent;*/
  /*为下拉小箭头留出一点位置，避免被文字覆盖*/
  padding-right: 14px;
}
/*清除ie的默认选择框样式清除，隐藏下拉箭头*/
select::-ms-expand {
  display: none;
}
body {
  background-color: #f4f0f0;
}
@keyframes top_show {
  from {
    transform: translateY(120%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
